Hi,
ok my system is a Q6600, ATI 5770, 4GB RAM...most of these games are still in the positive, speedwise...from my end.
I fixed the SND bug, switched to stereo on my system, only. So far, I tried to reproduce the problem, strangely it won't happend anymore. Just had a 4v4 with random people and all went smooth.
About the crashes, it "always" happened when I killed an ACU, instantly. No deathnuke, nothing. Oh and Steam games are always fine, nothing like that happens there.
I will turn down the fidelity, of course. Thx for all the help so far.
P.S.: Played 4 more games, no freezes anymore...?!